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Indiana Department of Environmental Management

Air Toxics Program

IDEM Air Toxics > Monitoring > Air Toxics Monitor Siting Air Toxics Monitor Siting

The Indiana Department of Environmental Management (IDEM) evaluates many urban areas throughout Indiana in order to select the regions to be monitored as part of the ToxWatch network. Urban areas were selected based primarily on population density and presence of industry. Dense populations also result in increased motor vehicle emissions.

Once an area in a city has been selected as a monitor location, possible sites in that area are surveyed to be sure they meet necessary criteria. Specific siting criteria for ToxWatch monitoring locations include:

  • unobstructed air flow,
  • a sampling height of 2 to 15 meters above ground level (the breathing zone),
  • security,
  • reasonable accessibility by operators,
  • the amount of site preparation necessary, and
  • the availability of other sites in the area.

Current Monitoring Locations

East Chicago

The East Chicago Air Toxics Monitor (also known as the East Chicago – Marina monitor) is located at the East Chicago Marina, 3301 Aldis St., East Chicago, IN 46312. It has been monitoring air toxics concentrations from 2012 through the present day. The East Chicago – Marina monitor is located in the northwestern portion of the state in Lake County. This area of Indiana is one of the most heavily industrialized areas of the county.

Gary

The Gary Air Toxics Monitor (also known as the Gary IITRI monitor) is located at the IITRI Bunker, 201 Mississippi St., Gary, IN 46402. It has been monitoring air toxics concentrations from 1999 through the present day. The Gary – IITRI monitor is located in the northwestern portion of the state in Lake County. This area of Indiana is one of the most heavily industrialized areas of the nation.

Hammond

The Hammond Air Toxics Monitor (also known as the Hammond – 141st St. monitor or the Hammond CAAP monitor) is located at 1300 E. 141st St., Hammond, IN 46327. It has been monitoring air toxics concentrations from 1998 through the present day. The Hammond CAAP monitor is located in the northwestern portion of the state in Lake County. This area of Indiana is one of the most heavily industrialized areas of the nation.

Whiting

The Whiting Air Toxics Monitor (also known as the Whiting – HS monitor or the Whiting High School monitor) is located at 1751 Oliver St., Whiting, IN 46394. It has been monitoring air toxics concentrations from 2004 through the present day. The Whiting High School monitor is located in the northwestern portion of the state in Lake County. This area of Indiana is one of the most heavily industrialized areas of the nation.

Ogden Dunes

The Ogden Dunes Air Toxics Monitor (also known as the OD - Diana Rd monitor) is located at the Water Treatment Plant, 84 Diana Rd., Ogden Dunes, IN 46368. It has been monitoring air toxics concentrations from 1998 through the present day. The Ogden Dunes monitor is located in the northwestern portion of the state in Porter County. This area of Indiana is one of the most heavily industrialized areas of the nation.

Terre Haute

The Terre Haute Air Toxics Monitor (also known as the Terre Haute – Fort Harrison Rd. monitor) is located at the Indiana Department of Transportation (INDOT) Maintenance Facility, 2900 Fort Harrison Road, Terre Haute, IN 47804. It has been monitoring air toxics concentrations from 2013 through the present day. The INDOT monitor is located in Vigo County in west central Indiana.

Indianapolis

The Indianapolis Air Toxics Monitor (also known as the Indianapolis – Washington Park monitor, George Washington Park monitor, or just Washington Park monitor) is located in George Washington Park, 3120 E. 30th St., Indianapolis, IN 46218. It has been monitoring air toxics concentrations from 1999 through the present day. The Washington Park monitor is located in the center portion of the state in Marion County. The second Indianapolis Air Toxics Monitor (known as the Indianapolis – Near-Road or Indpls - I-70 E monitor) is located at 1650 Ludlow Ave. It started monitoring air toxics concentrations in 2016.

Evansville

The Evansville Air Toxics Monitor (also known as the Evansville – U of E monitor or the University of Evansville monitor) is located at the Carson Center on the campus of the University of Evansville at 1800 Walnut St., Evansville, IN 47714. It has been monitoring air toxics concentrations from 1999 through the present day. The University of Evansville monitor is located in the southwestern portion of the state in Vanderburgh County.

Clarksville

The Clarksville Air Toxics Monitor (also known as the New Albany - Falls of the Ohio monitor) is located at the Falls of the Ohio State Park, 201 W. Riverside Dr. Clarksville, IN 47129. It has been monitoring air toxics concentrations from March, 2008 through the present day. The Clarksville monitor is located in the southern portion of the state, on the Ohio River at the southern tip of Clark County.